40. I could have offered you some help last weekend, but I ______ with my work at that time.
I saw ___ boy and ___ old woman sitting at the table.I thought ___ old woman must be ___ boy’s grandma.
Taiwan is ___ island, it is ___ large island of China.
____ knowledge is better than ___ wealth.
I enjoy living in ___ room, ___ window of which opens to ___ south.
It’s ___ time that he has failed in the experiment.However, he has made up his mind to try ___ time next week.