33.I don’t think_____________difficult fora Chinese student to master a foreign language within five years34.

Oh, my god! What should I do— What’s up– I suddenly ___my homework is still at home. I have to go back quickly for it.

The retired workers were invited to the company,________surprise,changes had been so great overthe years[ ]

He seems poor, but I____ that he has quite a lot of money.[ ]

She is a doctor_______ she is my teacher.