—Shall we have a smoke here?—No, we _____ because this is gas station and the worker is carrying some petrol.
. ______ is known to everybody, the moon travels round the earth every month.
. When you are driving on this road, you have to limit your speed _____ 60 miles per hour.
. —What do you mean. There are only ten tickets? —There ______ be twelve.
. Jane is said _______ an opera singer in her youth.
. It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.