The internet has made ____ possible for everyone to talk with friends miles away.
A. that B. this C. one D. it
The _________ at the military academy is so rigid that students can hardly bear it.
A. convention B. confinement C. principle D. discipline
I remembered _____ the door before I left the office, but forgot to turn off the lights.
A. locking B. to lock C. having locked D. to have locked
Teachers required that all the students ___ their homework all alone.
A. must finish B. would finish C. had to finish D. finish
His favorite food is fried snack and soft drinks. ______ is no surprise that losing weight is just his dream.
A. There B. It C. As D. What
The most interesting thing to the small boy was _______ he got close to the door, it would open of itself.
A. that as B. that that C. what that D. what when
