—I called you several times this afternoon. Why didn’t you answer the phone?
--I’m sorry. I ________ an important meeting then.
| A．is having | B．was having |
| C．will have | D．have had |
My best friend helps to ______ the best in me，as the saying goes．（ ）
A．bring outB．bring inC．bring up
Artemisinin _______ by Tu Youyou，a great Chinese scientist．（ ）
A．was inventedB．invented
C．has invented
As our children get bigger，our house seems to get ________．（ ）
A．the smallerB．smaller
C．smallest
The watch _______ you gave me keeps perfect time．（ ）
A．whoB．whatC．that
She went to a European university to study art．_______ university is really amazing．（ ）
A．AnB．TheC．A