We stayed there and watched the opera ______ an hour.
| A．in | B．for | C．at | D．on |
______ of the students in my class plan to go abroad for ______ study in the future.
| A．Two-thirds; farther | B．One-thirds; farther |
| C．Three-fourths; further | D．Three-fifth; further |
Sound travels ______ air ______ a speed of about 340 metres per second.
| A．over; in | B．through; at | C．by; at | D．through; over |
We knew little about Shu-How Lin, a basketball player from New York Knicks, __________ we watched the basketball matches in NBA.
A. until B. if C. when D. because
The book written by Mo Yan is worth ______ a second time.
| A．to read | B．to be read | C．reading | D．being read |
He didn’t listen to the teacher carefully in class. ______, he couldn’t pass the exam.
| A．Even though | B．As a result | C．Instead | D．In order to |