Tom ______the USA. He ________back in two months.A. has gone to; comes B. has gone to; will beC. has been to; comes D. has been to; will be
We should eat _______ fruit and vegetables, but _______ meat. It is good for our health.
—Must we keep the window _______ all the time? —No, you don’t have to.
Smoking can help you relax. But _______ it is also bad for your health.
I have some problems with my health. Can you give me some _______?
Some medicine is dangerous for children. Parents should put the medicine in places children can’t _______.