．—There is likely to be heavy rain tomorrow.
—_______, we’ll have to change the plan for the outgoing.
| A．If so | B．If not | C．Unless so | D．Unless not |
Whom do you think Mary will _________ into the matter instead of her?
| A．have looked | B．have to look | C．have had looking | D．have look |
Recently our community has launched a campaign among all the residents , ____ we are called upon to do our little but to prevent the worsening environment.
| A．where | B．which | C．as | D．when |
As is required by their employer, the employees ______ finish the project within this month.
| A．could | B．shall | C．may | D．should |
It is really a pity that I can not attend your wedding party this weekend. I _________ a very important international conference in Paris then.
| A．have attended | B．are attending | C．have been attending | D．will be attending |
Do you really want to rent such a flat which is empty ________ some old pieces of furniture?
| A．besides | B．except for | C．for | D．except |