一Isn't it a surprise that I happened to meet Francis Mathews at the Christmas party last week?
一If my memory serves me correctly, you _____ each other for exactly two years.
| A．hadn't seen | B．haven't seen | C．didn't see | D．don’t see |
Shopping online can save much time as you _______ go to a shop or walk around crowded
shopping centers.
| A．don’t have to | B．oughtn’t to | C．won’t | D．mustn’t |
______ there are living creatures in the outer space as those on Earth hasn’t been proved until
now.
| A．How | B．When | C．Where | D．Whether |
With so many orphans _______, the charity organization calls for more donations.
| A．to look after | B．being looked after | C．to be looked after | D．looked after |
Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and
experts can’t be exactly sure about its use.
| A．had been found | B．was found | C．has been found | D．would be found |
Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent
fewer calories than usual increased life span.
| A．for which | B．to which | C．of which | D．in which |