Greenland， _____ island in the world，covers over two million square kilometers.
| A．it is the largest | B．that is the largest | C．is the largest | D．the largest |
---Do you know the timetable of the school bus?
---Sure, the first trip________ at 6:30 a.m. and usually continues until 4 p.m. on weekdays.
| A．will start | B．starts | C．is starting | D．started |
Words failed to ________ my feelings the moment I saw my long-lost sister.
| A．control | B．convey | C．exchange | D．affect |
Do you know how much time and effort they devoted________ such a complicated project?
| A．to complete | B．completed | C．completing | D．to completing |
When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance.
| A．encouragingly | B．amazingly | C．interestingly | D．astonishingly |
Never before________ seen a girl who can swim as fast as Ye Shiwen.
| A．had we | B．we had | C．have we | D．we have |