1．—I went to work on foot yesterday，though it ________.
—You ________ by bus.It was likely to get a cold.
A．is raining；must have gone
B．rained；would go
C．was raining；should have gone
D．have rained；could have gone
2．—I don't think I can achieve my aims.
—In my opinion，you shouldn’t ________ such a difficult task.
A．attempt B．have attempted
C．manage D．have managed
