—Either, thanks.

A. an; an B. a; a C. an; a D. a; an

A.protectB.protectingC.to protectD.protected

A.inviting; joinB.to invite; to joinC.invite; to joinD.to invite; join

A. She’s going to write an article. B. She’s going fishing. C. She is going to read a book.

A. America. . B. China C. England.

A. It’s snowy. B. It’s cloudy. C. It’s sunny.

—Sorry, Mom. I ________ Betty on the phone now.

A. talks withB. talk withC. can talk withD. am talking with

A. somethingB. everythingC. a thingD. nothing

A. A blue one. B. A white one. C. A black one.

--I’m not sure. He ______ not come.

A. must B. can C. may D. should