--It is snowing outside. Let’s build a snowman ?--Good idea..
If you have trouble pronouncing these words, you can repeat them over and over again ________ you are comfortable with them.
一Would you like to go to the amusement park? —If Jack does,________.
—It’s difficult to get to the other side of the river. —I think a bridge ________ over the river.
She said she returned the book to the library.I'm sure she ________.
一Do you know why he didn’t ________ a word when he ________ to? —Because he was too nervous.