Which of the following is harmful to your eyes if you keep doing it for a long time？（ ）
A．B．
C．D．
Jack may fall behind the other students in his class when he _________ back from England next week.
Lily ________ other colours ________ blue, green and yellow.
He will send me a message as soon as he _________ in London.
Nobody ______her because she has a new look.
I don’t know if Mr. Smith ____. If he ___, I will tell you.
B．
D．
B．D．
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