—Why didn’t Tom go to the concert last night ?
— I have no idea,but I think he _____ in his study.
| A．read | B．have read |
| C．was reading | D．would read |
The children talked so loudly at dinner table that I had to struggle _________
| A．to be heard | B．to have heard | C．hearing | D．being heard |
At present, computer knowledge has become ___________ requirement as the ability to read and write.
| A．so basic a | B．so a basic | C．as basic a | D．as a basic |
Make sure the gas is turned off after a bath, which would ________ cause danger.
| A．somehow | B．meanwhile | C．otherwise | D．furthermore |
Bats are surprisingly long-lived creatures, some ________ a life span of 20 years.
| A．having | B．had | C．have | D．to have |
We won’t ______ you ______ away with cheating in the exam.
| A．let; getting | B．have; get | C．let ; keeping | D．have; getting |