There are some health problems that，when ________ in time，can become bigger ones later on. (2013·浙江，19)
| A．not treated | B．not being treated |
| C．not to be treated | D．not having been treated |
Sorry to say it will be years _______ we really have classes here with only 25 students.
| A．since | B．that | C．when | D．before |
--Why are you so depressed, Lily?
--- I lost the contest narrowly, or I _________ the award of $10,000.
| A．had gained | B．would have gained | C．would gain | D．must have gained |
Hurricane Sandy struck the northeastern United States, ____________ millions of people homeless.
| A．to make | B．making | C．having made | D．made |
-- Hi, Samantha! When did you arrive in Leeds?
--- Last week, I ___________ a different culture since then.
| A．was experiencing | B．will be experiencing |
| C．have been experiencing | D．had been experiencing |
Chengdu No. 7 High School, _____________ in 1905, is home to a great many excellent students.
| A．found | B．founding | C．founded | D．having founded |