So __ _ that all the living things died out gradually .
| A．serious polluted the lake is | B．serious polluted is the lake |
| C．seriously polluted the lake is | D．seriously polluted is the lake |
—Look！He’s running so fast!
—Hard to________his legs were once broken.
| A．know | B．imagine | C．realize | D．find |
—I saw no more than one motor car in that shop.Will you go and buy________？
—No，I’d rather buy________ in other shops.
| A．one；one | B．it；one | C．one；it | D．it；it |
Leave your key with a neighbor ________ you lock yourself out one day.
| A．ever since | B．even if | C．soon after | D．in case |
Forests ________ and burned at such a speed that they will disappear from the earth in the future.
| A．cut | B．are cut | C．are being cut | D．had been cut |
—I’ve got a cough and my chest hurts.
—________.Let me examine you.
| A．Don’t mind |
| B．You should learn to protect yourself |
| C．Take it easy |
| D．Keep calm.You will recover soon |