___________ we can have clean drinking water lies in ___________ effective measures will be taken by the government about water pollution.
.-----Tommy is planning to buy a car.----I know .By next month, he______ enough for a used one.
In the last few years thousands of films all over the word.A .have produced B. have been producedC. are producing D. are being produced
I'll go to the library as soon as I finish what I .
Tom in the library every night over the last three months.
—Bob has gone to California.—Oh, can you tell me when he ?