If _____ carefully, the experiment will be successful.
| A．do | B．does | C．done | D．doing |
______ you think you can or not, you must finish the project before Friday.
| A．If | B．Unless | C．Though | D．Whether |
Good news-two of our classmates ______ into Tsinghua University in advance!
| A．have admitted | B．have been admitted | C．admit | D．will admit |
．Now natural disasters happen one after another, ______ warns man to treat nature kindly.
| A．it | B．that | C．which | D．as |
It is usually cool in April in Chongqing, but it sometimes ______ be rather hot for a few days.
| A．can | B．must | C．shall | D．ought to |
Two decades ago this city was ______ but a small unknown town.
| A．something | B．anything | C．everything | D．nothing |