. Doctors say _____ good diet is of ______ great benefit to our health.
| A．a , a | B．the, a | C．a, / | D．the, / |
—Is there anything wrong, Bob? You look sad.
—Oh, nothing much. In fact, I __________ of my friends back home.
| A．have just thought | B．was just thinking |
| C．would just think | D．will just be thinking |
The flowers were so lovely that they __________ in no time.
| A．sold | B．had been sold |
| C．were sold | D．would sell |
—Ouch! You hurt me!
—I am sorry. But I __________ any harm. I __________ to drive a rat out.
| A．didn’t mean; tried | B．don’t mean; am trying |
| C．haven’t meant; tried | D．didn’t mean; was trying |
—I have got a headache.
—No wonder. You __________ in front of that computer too long.
| A．work | B．are working |
| C．have been working | D．worked |
Cathy is taking notes of the grammatical rules in class at Sunshine School, where she __________ English for a year.
| A．studies | B．studied |
| C．is studying | D．has been studying |