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 |
---Excuse me, sir, but ___ you speak English? ---Sure, but only a litte.
| A．do | B．can | C．will | D．would |
Look, here ___ the bus!
| A．comes | B．is coming | C．will come | D．has come |
--Will you tell us something about the weather there?---I ___ to that.
| A．go | B．come | C．’m going | D．’m coming |
Suppose he ___ with me, what can I do?
| A．won't go | B．don't go | C．hasn't go | D．isn’t going to go |
“You are ___!” he cried to me.
| A．joked | B．have joked | C．joking | D．joke |