My mother devoted all her spare time to learning typing during the two years.—That’s the case, or she ________ the job in that computer company.[ ]

Do you like Jane’s new dress—Yes, very much. I’ll ask Mom to buy for me.

Listen! Tom is singing in the next room.–It _______ be Tom. He has gone to Shanghai.

Had I known about this computer program, a huge amount of time and energy ________. [ ]

You can never be ________ when crossing thestreet