小题1:The doorbell rang suddenly when/while/as Mum/mother)was cooking supper/dinner last night/yesterday evening.

小题2:I’ll call you as soon as I get/ receive your letter.

小题3:Mr. Wu often spends lots of time telling stories to us.

小题4:I’m looking forward to a holiday without (any) homework..

小题5:She would rather wait (for) another hour than wake up her mother.

/ She prefers(preferred) to wait for another hour rather than wake up her mother.

/ She prefers(preferred) waiting for another hour to waking up her mother.

题目分析：

小题1:根据“昨晚”我们可知，本句应该用过去时，而根据“在……时”可知，应该用when或while引导的从句，并用过去进行时。

小题2:根据“一……就”可以应该用as soon as引导的时间状语从句，主句应该用将来时，从句用一般现在时。“收到信”是receive your letter。

小题3:根据“经常”often可知，应该用一般现在时，“花费时间做某事”是spend…doing

小题4:“期待某事”是look forward to sth。“没有”应该用without。

小题5:“宁愿做某事，而不愿做某事”是prefer……to或prefer to do……rather do或would rather do than do，应该注意动词的形式。

点评：完成本题需要注意四点：一是人称，根据句子的意思确定句型的人称；二是时态，应根据动作发生的时间来确定时态；三是注意固定用法的试用；四是应符合英语的表达习惯。