They________to Tibet many times.
“film” is also called __________ in American English.
—A nice day today, isn’t it?—Yes. __________ go for a picnic and relax.
Nanjing isn’t as large _____ Shanghai, but it’s the second _____ city in East China.
On my way to school, I go __________ his house every day.
Good teachers are usually __________ in their students.