If we had taken such effective measures much earlier, the river________so seriously now.
| A．is not polluted | B．would not be polluted |
| C．had not been polluted | D．would not have been polluted |
Years ago we didn’t know this, but recent science _______ that people who don’t sleep well soon get ill.
| A．showed | B．has shown | C．will show | D．is showing |
Zheng says that the most dangerous thing about a credit card is____ a person isn’t always aware of the fact____ he’s spending money.
| A．that; that | B．what; that | C．that; what | D．what; which |
He made up an excuse for his mistake in order to avoid_________.
| A．punishing | B．to punish | C．to be punished | D．being punished |
Although we had told them not to keep us waiting, they made no _________ to speed up deliveries.
| A．trial | B．attempt | C．action | D．progress |
It rained heavily in the south,serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |