At that time, the computer was a great________ /ɪn'venʃn/.
| A．invent | B．invitation | C．invention | D．Inventor |
I usually come to school _______.
A. by a bus
B. on foot
C. by foot
Who knows the key ____ Exercise 1? Put up your hands.
A. to B. of C. with
I ________ at this time of yesterday.
A. started do my homework
B. started my homework
C. started to do my homework
_____ they are brothers, they don’t look like each other at all.
A. Because B. Though C. When
Jackie is _____ careful, so he seldom(很少) makes mistake.
A. usually B. never C. always