—Will you give me a hand? I have some trouble_______ the scientific problem.
—Don't worry. I'll try my best to help you _______.
| A．solving; in five minutes | B．to solve; in five-minute |
| C．to solve; after five minutes | D．solving; after five-minutes |
---I don’t know _______. Can you help me? ---I think you should calm down and read texts.
| A．how to do | B．what to do it | C．what to do | D．when to do |
I wanted to buy a copy of The Youth, but there was _______ left in the bookshop. _______has just bought the last one.
| A．no one; Everybody | B．something; Nobody | C．anyone; Somebody | D．none; Somebody |
We must be strict _________ our work and strict _________ ourselves.
| A．with; in | B．in; with | C．in; in | D．with; with |
You seem ___________. What are you____________?
| A．worries; worrying about | B．worry; worried about |
| C．worried; worrying about | D．worried; worry about |
These broken pieces of plates don’t fit together, they ___________ parts of different ones.
| A．can’t be | B．can be | C．mustn’t be | D．must be |