He is a student at Oxford University, ____for a degree in computer science.
| A．studied | B．studying | C．to have studied | D．to be studying |
Psychological studies show that some people are quick-tempered _____.
| A．at heart | B．on purpose | C．in person | D．by nature |
The _____ stuck on the outside of the envelope said "By Air".
| A．label | B．ticket | C．signal | D．sign |
It was the largest experiment we had ever had; it _____ six hours.
| A．ended | B．finished | C．prolonged | D．lasted |
I have been looking for this book for months, and _____ I have found it.
| A．at least | B．in no time | C．at last | D．at present |
He offered to _____ her a hand as the suitcase was too heavy for her to carry.
| A．lend | B．help | C．show | D．loan |