1.Japan says its prime minister promised to provide the world with "maximum transparency" about ____ accident at the Fukushima nuclear power plant during _____ telephone call.
A. the; a B. the; the C. an; the D. an; a
2.It is thought that Henan Shuanghui Industry Group Co., Ltd. ____take responsibility for its consumers.
A. can B. may C. must D. need
3. The civil war in Libya that ______on March 12 _______ for a week until now.
A broke out; has lasted B breaking out ; was lasted
C was broken out; has lasted D broke out; lasting
4. It was not until the subprime loan crisis(次贷危机) had caused great damage to the American financial system ____ Americans realized the severity（严重性）of the situation.
A. which B. that C. what D. when
