单选题：The two girls are so alike that strangers find_______difficu..

—Lydia, what did our head-teacher say just now? —Every boy and every girl as well as the teachers who _____ to lead the group _____ asked to be at the school gate before 6:30 in the morning.A．is; isB．are; areC．are; isD．is; are

—What's the matter with your boyfriend?— I can't stand _____ when he often ignores me and talks with other girls. [ ]A. one B. that C. him D. it

The fire made ______ difficult to rescue the people trapped under the ruins in the earthquake. [ ]A. /B. this C. that D. it

____ you bring _____ to his attentionthat now students are bearing too heavy a leaming load(负担) ?[ ]A. Why not; that B. Why not; this C. Why don't; itD. Why don't; what

_____ and I'll get the work finished. 　　[ ]A. Have one more hourB. One more hour　　C. Given one more hour D. If I have one more hour