She had just finished her homework _____her mother asked her to practice playing the piano yesterday.
| A．when | B．while | C．after | D．since |
---Are you being_____, sir?
---No, I just want to buy a cellphone.
| A．looked after | B．attended to | C．led in | D．admitted in |
The old man had a son and a daughter, ____ treated him well, _____ greatly disappointed him.
| A．neither of them, which | B．neither of whom, which |
| C．neither of them, it | D．neither of them, which |
---Will this fish_____ until tomorrow?
---Only if you put it in the fridge.
| A．keep | B．last | C．stay | D．remain |
Uncle Wang is a genius cook and we_____ never get enough of his cookies.
| A．need | B．may | C．should | D．can |
If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.
| A．say | B．tell | C．speak | D．call |