The plant’s plans will _________ thousands of lives.
A.danger
B.endanger
C.dangerous
D.dangerously

Could you _______ your name here, please?
A.signing
B.signal
C.signature
D.sign

His speech was too long. He should have ______ it.
A.short
B.shorten
C.shortened
D.shortly

He always thinks he's right. He never ______ for his mistakes.
A.apologies
B.apologise
C.apology
D.apologizes

Tony had little difficulty in passing the examination, ....he has a very good foundation in English.
A.since
B. as
C.for
D.because

.... you are over 18, you can join the army.
A.As long as
B.Due to
C.Because of
D.On account of

Jane joined the English Club.... .
A.because of she wanted to improve her English
B.because she wanted to improve her English
C.thanks to her improving English
D.due to her improvement of English

Since there was no electricity during the storm,.... .
A.so we have to use candles
B.due to the fact that we have to use candles
C.we have to use candles
D.because of using candles

.... , so he was late for work.
A.Paul had missed the train
B.Because Paul had missed the train
C.As Paul had missed the train
D.On account of Paul’s missing the train

..... than his friend called.
A.He had no sooner arrived home
B.
Before he had arrived home
C.Not until he arrived home
D.As soon as he arrived home