________ your spirits. Try again and you’ll succeed.
| A．Catch up | B．Catch on | C．Keep up | D．Keep on |
—Why does the lake smell terrible?
—Because large quantities of water _____.
| A．have polluted. | B．is being polluted. |
| C．has been polluted. | D．have been polluted. |
Sarah hopes to become a friend of_______ shares her interests.
| A．anyone | B．whomever | C．whoever | D．no matter who |
After years of overwork, my father’s health ____ and he had to retire from business.
| A．broke out. | B．broke up. | C．broke down. | D．broke off. |
_____ you may have, you should gather your courage to face the challenge.
| A．However serious a problem. | B．What a serious problem. |
| C．However a serious problem. | D．What serious a problem. |
—My cousin would like to risk _____ the weight-loss pills rather than _____ in a gym.
—Really? She must be mad.
| A．to take; work out. | B．to take; working out. |
| C．taking; working out. | D．taking; work out. |