—Wow，an iPhone 7，what a big surprise! Thanks，darling!
—It's your birthday present.But please read the ________ carefully before you use it.
A. information    B. instruction    C. invitation

Our teacher often tells us ________ time.
A. not to spare    B. not to spend    C. not to waste

Mike worked really hard.His scores________in the final Chinese exam.
A. doubled    B. disappeared    C. mastered