Had it been possible, I would have gone to attend Monica in the hospital, but I _______ fully occupied last month.
There is a new problem involved in the popularity of private cars __________ road conditions need __________.
We've been told the good news, but when and where to go for theexciting paid vacation __________ yet.
In 1948,three American scientists invented __________ transistor, which is __________ small electronic device to control an electric current.
__________ yesterday, we went out for a walk.
Peter is a brilliant language learner. Within two weeks, he hasdeveloped a good __________ of Chinese and Japanese. A. customB. imagination C. exceptionD command