Milk bottles need cleaning thoroughly before they are used again, __ _ they?20 don't mustn't needn't aren't A
21
B well necessary in good
22
C possible possibly
likely like
23
A to when what which
24
A too very so that
25
B On In By From
26
C important
useful useless necessary
27
B any none each no
28
C accepted developed rejected thought
29
A found finding find founded
30
C
love feelings determination solution
We should encourage him to have confidence in himself. 我们应当鼓励他对自己要有信心。 He was very happy to hear from his old friend. 他很高兴收到他的老朋友的信。 Talking for a long time makes me tired. 长时间的谈话使我感到疲倦。