Car rental agencies _______ a boom in business ever since new restrictions made it harder for people to buy an automobile in the capital.
A．has enjoyed B．have been enjoying C．are enjoying D．enjoyed
Although the peak travel time for Chinese railway doesn't start until Jan 19 this year, people who're eager to get a seat on the train _______ already _______ their struggles.
A．are; starting B．has; started C．have; started D．are; started
Whale beachings（搁浅）_______ be caused by factors such as illness, or disorientation（迷失方向）caused by extra noise in the oceans, ______ shipping or oil and gas drilling.
A．might; from B．will; by C．should; in D．shall; on
Though measures have now been taken to prevent further price hikes, many people remain _______ over the rising cost of food.
A．be concerning B．concerns C．concern D．concerned
—The singer together with her band _______ invited to the concert. Did you enjoy that party?
—No, no sooner _______ than they sang their top hit Oh My Baby.
A．was; I had left B．were; I have gone C．was; had I left D．were; did I leave
Living in the dormitory means _______ to take care of yourself, understand each others' differences and share_______ interests.
A．to learn, common. B．learning, ordinary
C．to learn; ordinary D．learning; common
