________the afternoon of June 1st, many foreigners arrived ______Beijing.
---Could you tell me _____________? ---OK. Guiyang.
The river is very deep. My mother warns me _________ in it.
She hardly ever speaks English because she is afraid ________ mistakes _______grammar.
I don’t know ______ he will be back ______ the Dragon Boat Festival.
---Have they finished ________ the Water Festival? ---No, they haven’t.