Last year was the warmest year on record, with global temperature 0.68 ℃____ the average.
| A．below | B．on | C．at | D．above |
As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
| A．exactly | B．finally | C．gradually | D．frequently |
Judging from his face_______ there was a confident smile, we knew that he didn’t lose heart.
| A．in which | B．from which | C．by which | D．on which |
As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.
| A．concerns | B．descriptions | C．catastrophe | D．emergency |
Tom’s score on the test is the highest in the class. He _____.
| A．should study last night | B．should have studied last night |
| C．must have studied last night | D．must study last night |
I’m afraid I’m not ________ to help with the talent show, for I am fully occupied with my own project.
| A．reliable | B．convenient | C．available | D．accessible |