— Do you still remember when we went to Nanjing? — I can't remember now but ________sometime last summer?
Don't blame such a small boy any more. Even the wisest___ make a mistake sometimes.
A red light will start continuously flashing when the batteries____ low.
I’m sorry I didn’t phone you, but I’ve been very busy_____ the past couple of weeks.
The science of computer,____ rapid progress has been made, is the most important of all.
Before use, your new mobile must fully____.