.
Mary had to work at evenings and weekends. Only in this way _____ complete the reports by the deadline.
| A．was she able to | B．she was able to |
| C．she has been able to | D．has she been able to |
— ______, but are you forgetting something?
— Oh, my God. We haven’t fixed our next meeting yet.
| A．I’m sure | B．I’m afraid so |
| C．Take care | D．Excuse me |
______ food is hard to find, few birds remain throughout the year.
| A．Where | B．Although | C．Unless | D．When |
I wish I could go camping with you next weekend; it sounds fun. ______, I’ll have to work.
| A．Carelessly | B．Unfortunately |
| C．Hopefully | D．Naturally |
Happy times usually pass quickly without ______.
| A．noticing | B．being noticed |
| C．having noticed | D．to be noticed |
— I phoned you at seven last night, but nobody answered.
— Oh, I ______ some shopping in the supermarket.
| A．do | B．did |
| C．was doing | D．have done |