从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

You must ________ me, or you will be punished for your dishonesty.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

He is a stamp-collector and often spends a happy afternoon ________ his stamps.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

Sentences can ________ into clauses, and clauses into phrases.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

John Denver is a famous singer and ________ lots of ________ since he became successful.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

Have you ever ________ being an astronaut and travelling to space one day?

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

Don't be so serious. We just ________ you.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

In a way I can see what you mean, even though I don't ________ a single word that you have said.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

I ________ that you would turn to me for help and I promise I will do all I can to help you.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

More and more people are suffering from Aids, so scientists and doctors will have to ________ methods of curing this disease as well as preventing this disease from spreading.

从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。

Although few people understood his theory, Einstein ________ his opinion and went on with his research.