Yesterday I was about to leave for the market _____ my boss called and asked me to go back to the office at once．
| A．when | B．while | C．as | D．because |
People should think about _____ they can have a positive influence on the planet.
| A．why | B．that | C．what | D．how |
The doctor advised me to go on a diet because I _____ weight during the last two months.
| A．put on | B．have put on | C．had put on | D．would put on |
---Excuse me. Could you tell me the way to the zoo?
----Sorry, I’m new here.
----Oh.______.
| A．Thanks anyway | B．My pleasure | C．Never mind | D．No problem |
_____ her mother after being separated for 20 years, she couldn’t help, even though she tried not to, ______.
| A．Seen, crying | B．To see, cry | C．Seeing , crying | D．Having seen, crying |
He said that not until the wheat died from the lack of water_____ how serious the drought was.
| A．did the villagers realize | B．the villagers realized |
| C．the villagers did realize | D．realized the villagers |