Mr．Jiang ____ the company to develop the 5G network for years． Now he works as the chief engineer in it．（ ）
A．joinedB．was a member of
C．has joinedD．has been a member of
Another person was hurt by the tiger in the zoo．
What a pity! That is a lesson to us：we must take rules _______．（ ）
A．quicklyB．clearlyC．carefullyD．seriously
What do you think of the environment in your hometown？
It's _______．Both the air and the water are badly polluted．（ ）
A．not bad
B．as good as before
C．not so good as before
D．much better than before
Waiter，there's a fly（苍蝇）swimming in my soup．
So what do you _______ me to do，call a lifeguard （救生员）？（ ）
A．warnB．expectC．inviteD．encourage
I'm worried about our talent show tomorrow．
Be confident（自信的）！If you don't believe in yourself，_______ will．（ ）
A．nobodyB．anybodyC．everybodyD．somebody
Frenchmen are outgoing．It is _______ to make friends with them．（ ）
A．easyB．proudC．politeD．important