题目内容：

根据句意，用括号内所给动词的适当形式填空。（必要时加助动词或情态动词）

1.The shop was crowded with people ________ （wait）for presents．

2.Alexander Graham Bell ________ （invent）the telephone in l876．

3.It isn’t possible for me ________ （write）so many words in five minutes．

4.Work hard，and you ________ （improve）your English very soon．

5.Could you please ________ （not speak）so loud?

6.By the time I got up，my mother ________ already ________ （cook）the breakfast．

7.The girl is often heard ________ （sing）in the next room．

8.I like playing computer games，but I can’t spend much time ________ （play）it．

9.Look! It’s raining heavily．Why not ________ （take）a raincoat with you?

10.We know each other well because we ________ （be）friends since ten years ago．