If you are in a warmer place and can get your skin _____ to the sun for 20 minutes per day, you will need less vitamin D.
A. exposing B. being exposed
C. been exposed D. exposed
You can hardly imagine the difficulty the woman hadher children.
| A．brought up | B．to bring up | C．bringing up | D．to have brought up |
Scientists are convincedthe p
ositive effect of laughterphysical and mental health.
| A．of; at | B．by; in | C．of; on | D．on; at |
Playing basketball isgreat fun; it also provides us with a chance to develop our sense ofteam spirit.
| A．a;不填 | B．不填;a | C．a; the | D．不填；不填 |
It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold.
| A．can | B．must | C．will | D．shall |
In my opinion, ___ matters is not one’s looks, but one’s inner thoughts.
| A．that | B．it | C．what | D．this |