________ we have enough evidence, we can't win the case.

A．Once B．As long as

C．Unless D．Since

He is so busy. He cannot afford enough time with his son ________ he wants to.

A．even if B．as if

C．because D．before

________ small, the company has about 1，000 buyers in over 30 countries.

A. As B. If

C．Although D．Once

________ I have to give a speech, I get extremely nervous before I start.

A. Whatever B. Whenever

C. Whoever D. However

Mark needs to learn Chinese ________his company is opening a branch in Beijing.

A. unless B. until

C．although D. since

She says that she'll have to close the shop ________ business improves.

A. if B. unless

C. after D. when

In the global economy, a new drug for cancer, ________ it is discovered, will create many economic possibilities around the world.

A．whatever B．whoever

C．wherever D．whichever

I took my driving license with me on holiday, ________ I wanted to hire a car.

A. in case B. even if

C. ever since D. if only

You have to know ________ you're going if you are to plan the best way of getting there.

A. what B. that

C. where D. who

I truly believe ______beauty comes from within.

A. that B. where

C. what D. why