We don’t doubt _____ he will succeed in the research work.

One of the biggest problems in food production has always been that people have no reliable access to exact information, ____________ is often the case in China.

—Some Chinese students find it difficult to understand native speakers when in London.
—Exactly, ________they’ve learned a lot about grammar and known many words.

The teacher was angry about his being late for class, but he behaved ______ nothing had happened.

Shy people often avoid situations _________ require close contact with other people.

A plan has been put forward_______more graduates should go to work in the country

Most animals have  little connection with animals of a different kind , _______they hunt them for food .
A. if         B while            C. unless            D. as

.It's hard to find a satisfying job.So I hardly care what work it is ______I can make a living.

It was not until the teacher came in ______ the students all shut up.

Keeping in mind _____his mom had told him,the child waited patiently outside the gate.