4._______ water to grow is well-known.
| A．That trees need | B．These trees need | C．That tree needs | D．Trees need |
I _____ it to my parents that I have lived through those hard times.
| A．own | B．appreciate |
| C．thank | D．owe |
________ we ________ the other road, we might have arrived here in time for the meeting.
| A．If; took | B．Did; take |
| C．If; should take | D．Had; taken |
The workers’ appeal for increasing salary is worth ________.
| A．considered | B．considering |
| C．to be considered | D．being considered |
The lecture, ________ at 7:00 pm last night, was followed by a discussion.
| A．beginning | B．began |
| C．begun | D．to begin |
Tom, our manager, ________ for America in two days and he has asked me to find out when the earliest plane ________ next Sunday.
| A．is to leave; is going to take off |
| B．will leave; is taking off |
| C．is leaving; takes off |
| D．leaves; will take off |