题目内容

If there are more trees, the amount of oxygen in the atmosphere will be ________．

[　　]

A．less

B．fewer

C．smaller

D．greater

答案：D

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I asked the teacher if there ________ a meeting the next day.

I want to know if there a sports meeting next month. If they it, I must get ready for it.

---Some students want to know if there _____ a meeting this Friday evening.

---Yes, but if it _____, we’ll have it next week.

A. is going to have; rains B. is; will rain

C. is going to be; rains D. are going to be, will rain

Male wolves will protect their families if there _______.

A. is dangerous B. will be danger

C. in danger D. is danger