1 . Don’t be sad. Sometimes difficulties can ________ the best in us.

A．bring out

B．work out

C．look out

2 . The policemen are trying to _________ the cause of the accident.

A．work out

B．find out

C．bring out

3 . Before the guests arrived, mom quickly ________ some fruits and sweets on the table.

A．put out

B．laid out

C．worked out

D．found out

4 . In the Safety Week, a fireman taught us what to do if a fire ________.

A．works out

B．breaks out

C．puts out

D．runs out

5 . —On October 24, a huge explosion (爆炸) ________ when university students were doing experiments in a lab in Nanjing.
—I am sorry to hear that.

A．broke out

B．ran out

C．worked out

D．put out

6 . No one in our class would like to make friends John, because he likes to ________ how rich his family is.

A．deal with

B．work out

C．show off

D．laugh at

7 . 马克斯在老师的帮助下会解出—些难题了。
Max can ________ the help of the teacher.

8 . After my grandma retired(退休) from work, she _________ drawing to spend her free time.

A．took up

B．gave in

C．worked out

D．put off

9 . the way,   they,   the problem,   haven’t found,   to work out（连词成句）
________________.

10 . —This physics problem is too difficult for me. Can you tell me ________, Christine?
—Sure.

A．how to work out it

B．what to work out it

C．what to work it out

D．how to work it out