— Would you mind if I sing here?—           . Look at the sign. It says “Be Quiet”.

Not only the USA and Russia but also China ________ manned satellites to circle the earth.

Mother, together with her children , ______ to the hospital.

My trousers       being washed.What’s worse，this pair of trousers bought yesterday       too short for me.

E-mail, as well as telephones, _______an important part in our daily communication.