.He is said________a book on the history of Chinese tone bridge , but I don’t know if he has finished it. A. to have written B. to be writing C . having writing D writing
---You should have thanked her before you left. ---I meant _______. But when I was leaving I couldn’t find her anywhere.
Hawking became world-famous in _______. his thirties in the 1970’s the thirties in his 1970 his 30s in 1970’s the thirties during the 1970
I think whoever makes______contributions to the company than the others should get______income.
Our teacher is always busy preparing lessons until 11 o’clock at night,______we students have gone to sleep.
The news______is spreading around the airport is______ a heavy storm is coming.