ing, will you take part in the comingNational English Speech Contest —______, we should catch the preciousopportunity.

do I need to feed the pet dog—Twice a day.

Though the old lady used ____ her dog for awalk after supper ,now she has become used ___ at home.

The plan __________just because people were unwilling to cooperate (合作).

Be quiet, Mr. Smith is coming.—Don’t worry. It ＿＿＿ be him. Mr. Smith is muchtaller.