E-shopping, when properly , can save us a lot of time and energy.
| A．being done | B．done | C．doing | D．is done |
______ 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 |
I ______ Julia as soon as we arrive at the hotel.
| A．shall call | B．call |
| C．have called | D．called |