It rained heavily in Hainan province recently , _____serious flooding in 16 cities and towns.
| A．caused | B．having caused | C．causing | D．to cause |
There is no need to ______ angry words _______ me.
| A．sit at | B．stare at | C．put at | D．shout at |
The ground is all wet. It _________ last night.
| A．can’t have rained | B．may have rained | C．can have rained | D．must have rained |
Rather than _________ on a crowded bus, he always prefers ________ a bicycle.
| A．ride; ride | B．riding; ride | C．ride; to ride | D．to ride; riding |
We’re looking forward __________ the photo exhibition.
| A．to visiting | B．to visit | C．to having visited | D．visiting |
You will _______ your health if you work so hard，eat a little food and sleep badly．
| A．fail | B．improve | C．help | D．endanger |