问题

The volunteers try to convince people _the fact that some species are in danger of _.

A:had studied
B:about dying down
C:of dying out
D:on dying off

正确答案是：

同类题型

The tickets for the Imax film are sellingso well. Try to buy one before all the tickets .

The loud noise outside ______ our teacher’s voice so that we didn’t ______ what he was saying. [ ]

The first use of atomic weapons was in 1945, and their power _____ increased enormously ever since. [ ]

He called to tell me that you are in hospital, otherwise I ______ nothing about it.

This book can be used in ________countries.