问题
31. What the whole nation cares about most at present is ______ the rescue teams could find the missing plane.
A:that
B:if
C:why
D:whether;
B:if
C:why
D:whether;
正确答案是：
同类题型
u regret paying five hundred dollarsfor the painting”“No, I would gladly have paid______for it.”
didn’t attend the lecture,did she — Yes, she ________
o many noises from the busy traffic in the street, I couldn’t_____ and do my research work.