It is necessary for students to take tests at monthly______

A.how

B.in spite of

C.because of

D.even though

A. Who is he?

B. Who's it?

C. Who he is?

D. Who it is?

 A.Mattson. B.Elliot. C.Harold Mattson and Elliot Handler.

D.Harold Mattson, Ruth and Elliot Handler.

A.his particular shooting skills in playing basketball

B.his trying to save every minute to work out with o 'Neal

C.his persistence in constant hard training

D.his stronger desire for a title than other players

A.Anything else to show me B.Do you have anything to declare

C.Will you report anything D.Do you want to buy more gifts

A.Sure, my pleasure B.Don 't ask me

C.I don 't know D.Not my business

A.Take it easy B.Please feel natural

C.Make yourself at home D.Feel all right here

A.excuse me B.I 'm sorry C.Never D.I don’t

A. increased

B. is increased

C. has increased

D. are increased