—Who’s knocking at the door?—Maybe wanting to sell some new products.
As we all know, _________ car is becoming _________ popular way of transportation in big cities.
The climate is changeable in this area. You should prepare more clothes ___________ the sudden change of weather.
Any behavior that is repeated enough times will ________ become a habit and happen automatically.
The two newspapers have offered ______ views as to the same issue, which means they take different stands.
Mistakes don’t just happen; they occur for a reason. Find out the reason and then making the mistake becomes ________.