.
Many companies give away small quantities of their produce as samples ____ people can try them before buying them.
| A．if | B．because | C．so that | D．since |
—Will you join us in the party this Saturday evening?
—If I ____ ,I would ;but I will have left for Japan on business by then.
| A．am free | B．were to be free | C．will be free | D．would be free |
He didn’t put the things ______ they belonged, for ______ reason he got his punishment．
| A．which; that | B．what; this |
| C．that; whose | D．where; which |
How can you expect him to make any progress _____ you never give him a chance to have a try?
| A．when | B．unless | C．even though | D．until |
It is amazing that the little boy can swim ________the river ________100 meters in width.
| A．across; measuring | B．over; measured | C．across; measured | D．through; measuring |
We used to work in the same office and we____ often have coffee together, which I missed
so much years later．
| A．would | B．should | C．could | D．might |