Since nobody gave him any help，he________have done the research on his own.
| A．can | B．must |
| C．would | D．need |
Is this the reason ___________ at the meeting for his carelessness in his work?
| A．he explained | B．what he explained | C．how he explained | D．why he explained |
.Whenever we are in ________ , we must never lose ______ , but try to think of the way out.
| A．the trouble; our heart | B．troubles; hearts | C．trouble; heart | D．trouble; our heart |
The farm ______ we see today is no longer the one ______ it was ten years ago.
| A．that; that | B．where; that | C．where; what | D．which; which |
______ of the land in that district _______ covered with trees and grass.
| A．Two-fifth; is | B．Two- fifth; are | C．Two-fifths; is | D．Two-fifths; are |
_______ meet Mr Wang, chairman of the trade union, he waited at the gate of the factory.
| A．In order that | B．So that | C．So as to | D．In order to |