單項選擇題Don't disturb me. I（）letters all morning and have written ten so far.

A.write
B.have written
C.was writing 
D.have been writing


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1.單項選擇題I’ve come to ask him for the book. That’s why I （） wait until he comes back.

A.need
B.should
C.oughtto
D.have   to

3.單項選擇題I （） help. I can do it myself.

A.need    to
B.don’t    need
C.needn’t
D.need

4.單項選擇題Since the road is wet,（） last night.

A.it   must   have  rained
B.it   must   rain
C.it   must   be    raining
D.it   must   have   been  raining

5.單項選擇題（）that it was raining, he put on his raincoat.

A.See
B.To see
C.Saw 
D.Seeing