______ in the regulations that you should not tell other people the password of your e-mail account.
A. What is required B. What requires C. It is required D. It requires
At last, we found ourselves in a pleasant park with trees providing shade and ______ down to eat our picnic lunch.
A. sitting B. having sat C. to sit D. sat
More and more people are signing up for Yoga classes nowadays, ______ advantage of the health and relaxation benefits.
A. taking B. taken C. having taken D. having been taken
It was unbelievable that the fans waited outside the gym for three hours just ______ a look at the sports stars.
A. had B. having C. to have D. have
He transplanted the little tree to the garden ______ it was the best time for it.
A. where B. when C. that D. until
______ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
A. Put B. Putting C. Having put D. Being put
