The husband and wife run their own business near the entrance to the park.They do a __ Trade in souvenirs and gifts.
A.lovely B.lively C.active D.busy
To tell you the truth,the accident and the damage ___ resulted in frightened me so much that I almost gave up driving ever since
A.it B.that C.which D.what
--Have you ever visited the Opera House?
--Yes.When I was in Sydney,I__ it twice.
为什么选visted不选have visted/had visted?
the one 和that还有the ones和those的区别
比如:Is that lab in your school ___ the foreigners visted yesterday?
为什么不能用that只能用the one?是定语从句啊?
麻烦详细点好吗谢谢

The husband and wife run their own business near the entrance to the park.They do a __ Trade in souvenirs and gifts.
A.lovely B.lively C.active D.busy
选:D
To tell you the truth,the accident and the damage ___ resulted in frightened me so much that I almost gave up driving ever since.
A.it B.that C.which D.what
选:D
--Have you ever visited the Opera House?
--Yes.When I was in Sydney,I__ it twice.
为什么选visted不选have visted/had visted?
因为你看句子前面用was,说明是以前在那的时候去过两次，(说话人的时间是现在)所以只要用过去式就可以了. 关于have 和had的区别请看:讲解与例句
have had
We typically use have as a main verb with an object to talk about common actions. There are lots of things that we have in English, meaning that we enjoy or experience them. For instance, we can:

- have breakfast/lunch/dinner/supper/a bite to eat/a light meal

- have a hot or cold drink/a glass of wine/a cup of coffee/some mineral water

- have a shower/a bath/a wash and shave

- have a rest/a snooze/a siesta/a good sleep/a bad dream

- have a walk/a swim/a good time/a nice evening/a day off/a holiday/a good journey/a good trip

- have a word with someone/a chat/a conversation/a quarrel/an argument

- have a headache/a sore throat/hay fever/a bad back/a bad cold

- have a (good) job/some work to do/money/an opportunity/a chance

We use the present perfect tense when we want to connect the present with the (recent) past in some way and this will appear as has had or have had in full forms or as 's had or 've had in contracted forms:

- Have they had their breakfast yet? ~ They've had a glass of orange juice, but they haven't had anything to eat yet.

- He was in a foul mood when he got back, but now that he's had a shower and a snooze, he's calmed down a bit.

- Have you had a nice evening, Barbara? ~ I've had a rotten evening. I had an argument with Tom and I've had enough for one day.

- Have you always had hay fever? ~ I've had it every summer since I was 13.

"had had":-

Had had is the past perfect form of have when it is used as a main verb to describe our experiences and actions. We use the past perfect when we are talking about the past and want to refer back to an earlier past time, Madiini. In these examples, note the use of before, after, already and by the time as a trigger for the past perfect. Note also that the contracted form of had had is 'd had.

- She'd had a lot to drink and wasn't capable of walking home by herself.

- After he'd had a good night's sleep, he felt much better.

- She sacked him before he had had a chance to explain his behaviour.

- By the time he was twenty he'd already had four different jobs.

- I'd already had a word with Joan about re-locating to Manchester and now she's had time to think about it, she quite likes the idea.

Note that past perfect forms are a feature of if-clauses in the third type of conditional sentence when we are explaining past actions or regretting past inaction. Thus, had had is likely to appear in this construction:

- If I hadn't had a good education, I would never have got this job.

- If she had had children later in life, she would have been a better mother.

- If I'd had another ten minutes, I would've finished the examination paper.

- Had they had any savings they didn't need, they would've re-paid their son's student loan.

the one 和that还有the ones和those的区别
一般来说one是泛指,而the one是特指.that 概括性强.
the one 用来代替前面特指的单数名词,有时可用that代替(尤其在有后置定语的情况下. that=the+单数可数名词/不可数名词 代替前面出现的单数可数名词/不可数名词
比如:Is that lab in your school ___ the foreigners visted yesterday?
应该填什么?