While ________ in the countryside, he made many friends with the native there．
A: worked
B: working
C: he works
D: he is working
A: worked
B: working
C: he works
D: he is working
举一反三
- He didn't look well, for he _______ for sixteen hours A: had worked B: was working C: had been working D: works
- At the moment he _________ on a new idea. A: works B: worked C: is working
- -- Where is Matthew now?He ________ at the gym. A: works out B: was working C: worked out D: is working out
- He saw her ________ in the garden. A: work B: worked C: working D: works
- He ______for eight hours every day. A: working B: to work C: works D: worked