Because fuel supplies are finite and many people are wasteful, we will
have to install ______ solar-heating device in our home. A. some type of B some type of a这里为什么不选B?
33. The country has already sent up three unmanned spacecraft, the most recent _________ at the end of last March. (山东高考题)A.has been launched B. having been launchedC. being launched D. to be launched这道题只是因为有at the end of the last month就只能选C吗?
—How impressive China's 70th anniversary of National Day parade is!—Definitely. If only I _______ on the scene.A were B had been答案用的是had been。为什么were不可以呢?现在是两个人的对话,说话的时候并没有在现场与现在情况相反。
Could you please tell me ________ he will come here tomorrow? (A) if (B) whether (C) what (D) which 答案是 A,是由 if 引导的条件状语从句。但我如果将“________ he will come here tomorr...
...nts (洋流).… Ebbesmeyer found out in his researches that the shoes — about 60,000 in total — fell into the ocean in a shipping accident. …The Pacific Northwest is one of the world’s best areas for beachcombing (海滩搜寻) because winds and currents join here, and as a result, there is...
用于将来进行时的谓语动词必须是可延续性动词,短暂性动词则不可以?这句话对么? 如下题:1. I hope scientists ________ (find) a will find cure for cancer.2. A Chinese astronaut _________ (reach) will reach Mars by 2050.答案都不能用将来进行时对么?