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We should consider the students’ request________ the school library should provide more books on popular science.

Christina wasn’t saying anything, but the professor smiled at her _______she had done something very clever.

I doubt ____________all the people invited will come to attend the ceremony in such bad weather.

The elderly patients still prefer the traditional way, ______ online booking system is supposed to be convenient and fast.

We were going out for a Christmas meal together ____ the accident happened.

I will keep on trying, ______ I might fail a thousand times.

You can go out,   you promise to be back before 10 o’clock.

The two men talked in a low voice, ____nobody heard what they were saying.

—What has  made him look like lacking sleep?
—_______ his wife is ill and he has to get up several times a night to attend to her.

The teacher asked the two students to discuss the question in a low voice ________ they should bother the others.