—I hear your brother will enter Tsinghua University this summer.
—Exactly,he was a born genius.He was able to read and write ________ the age of 4.( )
A.inB.onC.atD.of
—Lucy, I’m poor in English. Could you give me some advice?
—You can speak it as ________ as possible.
much
more
most
We ________ each other since we met in the last summer camp.
won’t see
haven’t seen
didn’t see
—Mum, I can’t take care of Mary. She is crying all the time.
—Try to be ________, Jack. Your little sister is ill.
patient
serious
excited
According to the latest rules, everyone must have their temperature taken ________ they enter the school.
before
though
unless
The boy ________ be Tom. I saw him reading in the library just now.
shouldn’t
can’t
needn’t