Tourism, _______ it brings in money to a country, can also result in damage to the World Heritage sites there．
| A．once | B．while | C．if | D．as |
Mary, together with his classmates, _____ going to watch the game.
| A．is | B．are | C．will be | D．will |
They went off and left me ______ there all by myself.
| A．sit | B．sat | C．sitting | D．to sit |
The picture is ______ at least twenty pounds.
| A．worthy | B．worth while | C．worthwhile | D．worth |
As we all know, smoking too much can _____ cancer and many other illnesses.
| A．lead to | B．build up | C．result from | D．lie in |
The government tried its best to _____ the people’s needs, but the people were still not_________. In fact, what the government did was not___________.
| A．satisfy; satisfying; satisfied | B．satisfy; satisfied; satisfying |
| C．satisfied; satisfied; satisfying | D．satisfying; satisfied; satisfied |