The lesson drawn from the coal mine accidents is that safety measures are so important that we _____ take them too seriously.
A.can’t | B.should | C.mustn’t | D.shall |
________ if you want to do something, or you won’t be able to do it well.
A.To try your best | B.Trying you best | C.Try your best | D.Unless you try your best |
--- Father, I’m going out for a play.
---- _________ be long!
A.Don’t | B.It won’t | C.Won’t | D.You didn’t |
_______ your mind and you will find the way.
A.Using | B.Use | C.If you use | D.To use |
My brother is always making good use of the time _______ he can spare.
A.when | B.in which | C.while | D.that |
There was a teapot fashioned like a duck ,out of _____open mouth the tea was supposed to come out .
A whichB whoseC its D that