Now China is fighting against illegal cooking oil(地沟油), a kind of waste oil _____can cause a lot of illness.
Where is Mr. Zhao?—He _________ to Mount Fanjing. He’ll come back _______ a week.
You have finished writing an e-mail on computer , but too many mistakes in it . You can click _____ .
Can you tell me if he ________ ?—-If he _________, I will call you.
Let’s enjoy the song “Yesterday Once More”. It sounds________.