______ met, it won’t be easily forgotten.
| A．If you | B．when it | C．once | D．Once you were |
—Have you heard thatearthquake struck Japan on March 11?
—Yes. It came asshock to us.
| A．the; the | B．the; a | C．an; a | D．an; the |
John told me he’d like to go hiking with me, his voice _______joy.
| A．was heavy with | B．was full of | C．heavy with | D．full with |
----What _______ the children be doing?
----They _______ be playing a game called Bingo.
| A．might; can | B．can; might | C．might; might | D．can; can |
It’s required that mineral resources_______ hand in hand with the local environment protection.
| A．be exploited | B．exploit | C．have exploited | D．exploited |
Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers.
| A．playing; they | B．to play; they | C．playing; them | D．play; them |