Chinese scientists ______ on Tuesday that they ______ a low-cost welding robot, which can help improve welding efficiency for small factories.
| A．announces; had invented | B．announced; have invented |
| C．announced; had invented | D．announces; have invented |
The visit to the memorial of Jiaoyulu, a late model official who worked in Lankao in the 1960s was a _____ of Secretary Xi’s trip.
| A．highlight | B．preparation | C．destination | D．preference |
After leaving office in 1999, Nelson Mandela didn’t stop doing he thought was right.
| A．that | B．which | C．what | D．where |
– I heard you gave a big surprise to your mother on Mother’s Day.
– Yes. Only when I left my parents ______ how much I loved them.
| A．I realize | B．I had realized | C．had I realize | D．did I realize |
Owing to her balanced diet and regular exercise, she is very slim and athletic _____.
| A．in height | B．in detail | C．in shape | D．in sight |
Most of the audience wondered what idea a man who’s deaf from birth can have__ music.
| A．with | B．in | C．of | D．at |