We’ll go to the park to have s picnic ____ it rains.A. ifB. unlessC. besidesD whether
Our president calls on people to ________ all the food each meal.
Jack ________ dislike the weather in Beijing in spring.But now he ________ it.
We can ask him for advice at any time ________ during his holidays.
Would you like to tell me how to ________ at the table?
If you are invited to a dinner , you have to be there _______.