问题

The experts present at the conference all insisted that greenhouse gas emissionbe reduced from now on．

A:must
B:will
C:/
D:can

正确答案是：

同类题型

This is my book. _____ is over near the window.

下列各句中，表达不得体的一句是

ousin is said ________ anew computer program recently, but do you know when he will finish it

I hope I can volunteer my time in Search of Root this summer holiday. —_____________! No thing serious

Who saw it ______ at that time?