The two iPads are both in fashion and of good quality, but of them are not on sale. So you’d better make your decision as soon as possible.
Do remember to remind her_________the gas before she leaves.
Last summer holiday, I went back to my hometown, ________ the neighbours and the house ________ I used to be familiar with were gone.
Nuclear science should be developed to benefit the people ______ harm them.
—May I smoke here? —If you ________, choose a seat in the smoking section.
If you want to catch the first bus you’d better ________ for the bus station immediately.