Why does he look so tired these days?—Because he is _____too much pressure.[ ]

Sally used to be ______, but now she enjoys meeting and talking to new friends.

Lucy, which do you like better, tea or coffee?—I prefer tea _____coffee. [ ]

He is going camping_____ 6:00 _____ the morning of July 21st. [ ]

Wang Hui hopes ________ a scientist in the future.