Some parents often let their child ________ at home alone.

A.to stay  B.staying

C.stays  D.stay

—If you have any trouble, be sure to call me.

—________.

A.I am glad to hear that B.I will.Thank you very much

C.I have no trouble　　 　　　　　D.I will think it over

This question is ________ easy.All the students can answer the question.

A.too much B.too many　

C.much too　　　 D.many too

—Could we meet at 9 o'clock tomorrow morning?

—Sorry, let's make it ________ time.

A.other's B.the other 　　

C.another　　　 　　 D.other

—How many birds can you see in the tree?

—________.All the birds have flown away.

A.No one  B.None

C.Nothing  D.A few

________mothers both work in the same hospital.

A.Tim and Peter's B.Tim's and Peter

C.Tim's and Peter's D.Tim and Peter

There are ________people in the square.

A.three thousands B.thousands of

C.three thousands of　　　　　 D.thousand of

Don't ask for help________ you really can't do it by yourself.

       A.if      B.or           C.though      D.unless

—What did the teacher say just now?

—He said that the earth ________around the sun.

　　　 　　 A.go　　 B.goes　　　　 C.going　　　 D.will go

This book is so ________that we are all ________in it.

　A.interest; interesting B.interested; interesting

C.interesting; interested　　　　 D.interested; interest