1．He was __________ (caution) when he was riding the bicycle.
[答案] cautious
2．She was so sad because she failed in the maths test. Let's leave her __________.
[答案] alone
3．The child was told to __________ (apology) for being rude to his mother.
[答案] apologise
4．A lack __________ awareness of cultural difference to local customs can cause problems.
[答案] of
5．The training is designed to give staff __________ (confident) in managing problems.
[答案] confidence
6．It's hoped __________ everyone should make better use of water.
[答案] that
7．So __________ (serious) was he hurt in the accident that he was sent to hospital at once.
[答案] seriously
8．(2016·山东泰安模拟)In the __________ (absent) of any evidence, the police had to let the thief go.
[答案] absence
9．The middle－aged man was out of work；he __________ (apply) to several companies for a job.
[答案] applied
10．The gathering will be __________ (formal), so you needn't dress up.
[答案] informal
