Jack ______ from home for two days now, and I am beginning to worry about his safety.

Susan is very hardworking, but her pay is not ______ for her work.

I am surprised ______ this city is a dull place to live in.

Loudspeakers were fixed in the hall so that everyone ______ an opportunity to hear the speech.

The student said there were a few points in the essay he ______ impossible to comprehend.

It＇s high time we ______ cutting down the rainforests.

The party, ______ I was the guest of honour, was extremely enjoyable.

If only I ______ play the guitar as well as you!

______ dull he may be, he is certainly a very successful top executive.

It is absolutely essential that William ______ his study in spite of some learning difficulties.

______ at in his way, the situation does not seem so desperate.