--- “Fail to do your homework again?”
---“Sorry, I ____ something else and didn’t hear your assignment.”
| A．thought | B．had thought |
| C．was thinking | D．have been thinking |
Friends are like leaves, ________ everywhere, but true friends are like diamonds, precious and rare.
| A．found | B．finding | C．to find | D．being found |
Simply learn to live in the present, ________ think so much about the future or the past.
| A．rather than | B．other than | C．more than | D．less than |
--- How much shall I pay for the phone call?
--- You ________. This is free of charge.
| A．shouldn’t | B．can’t | C．don’t have to | D．mustn’t |
Mary, stop to have a rest. You _________ the flowers in your garden for nearly two hours.
| A．are watering | B．were watering |
| C．water | D．have been watering |
--- What’s that noise?
--- Oh, my God! I ________ to turn the tap off after I brushed my teeth.
| A．forget | B．forgot |
| C．was forgetting | D．had forgotten |