Question

.— __________ is the population of China?

. — __________ is the population of China?　　—Over 12 million.　　A. How many 　　B. how long 　　C. What 　　D. How答案是C 我选的是A为什么错了 Everyone is busy __________ ready for Christmas.　　A. to get 　　B. getting 　　C. got 　　D. gets答案B 怎么不用A　　 _________ of the boys plays football well.　　A. Both 　　B. All 　　C. Some 　　D. Neither答案是D 我不会做　　 By the end of last term, we _________ twenty songs.　　A. had learned 　　B. have learned 　　C. are learning 　　D. were learning 答案是A 我选的B

Answer 1

— _____what_____ is the population of China?　 === How many people are there in China? how many的后面要加名词复数（people）
Everyone is busy ____B______ ready for Christmas.　　
1 BE BUSY +动词ing
2 be busy with + 名词/ 代词
　 Neither of the boys plays football well.　　
告诉我们一共有两个boys. 这两个的全部否定就用neither.
　 By the end of last term, we ____had learned_____ twenty songs.　　A. had learned 　　
by+过去的时间状语------谓语动词就是-----过去完成时。

Answer 2

population应用large/small来描述，如有“How large”，可选之，what 固然可以，人口是一个数据，可以用what 提问；
busy后跟doing；
看谓语，“plays”为单数形式，如选其他选项应用复数；
过去的过去，by the end of last term,在某时间点前已做完用完成式（by），在过去某时间点前已做完则用过去完成时(the end of last term),如时间点为现在，方用现在完成时，如：I have learned twenty songs so far.

如仍有存疑，敬请追问

Answer 3

population应用large/small来描述，如有“How large”，可选之，what 固然可以，人口是一个数据，可以用what 提问；
busy后跟doing；
看谓语，“plays”为单数形式，如选其他选项应用复数；
过去的过去，by the end of last term,在某时间点前已做完用完成式（by），在过去某时间点前已做完则用过去完成时(the end of last term),如时间点为现在，方用现在完成时，如：I have learned twenty songs so far.