5.　　　 　They started as soon as they ______ (receive)my telephone.

4.　　　 　I ________ (not know) it until you ________ (tell) me.

3.　　　 　When Tom’s mother came home, little Tom _______ (cry) loudly.

2.　　　 　He is hungry, because he ________ (not have ) his breakfast yet.

1.　　　 　It ________ (be) nearly two years since we went to the party last.

20.He ran as fast as possible ________ he could reach school on time.

A.　　 in order to　　 B. so as to　　　 C. when　　　 　　D. so that

19.The teacher understands that ________ Maths had always been easy for him, it is not easy for the students.

A.　　 since　　 B. unless　　　　 C. although　　　　 D. when

18.He will come to call on you the moment he ________ his painting.

A.　　 finished　 B. will finished　 C. has finished　　 D. had finished

17.It is at least ten years ________ these trees were planted.

A.　　 when　 B. before　　　 C. since　　 D. as soon as

16.I was about to leave my house ________ the telephone rang.

A.　　 while　 B. as　　　　　 C. when　　　　　　 D. since