They looked _____ each other and kept their secrets _____ themselves.
When we went into the park, we saw someone _____ Chinese Kungfu.
—Can you give this book ____ Jack?—Yes, I can.
—Have you ever _____ Mudanjiang to see the Jingbo Lake?—Yes, I have.
You’d better speak aloud ______ we can hear you.
Xiao Li had an accident yesterday _____ he is in No.1 People’s Hospital now.