Parents should pay attention to the cases _______ their children have difficulty adapting to new surroundings.

“Would you like a glass of water”—“ . I’d like a cup of tea.”

looked for my pen for a long time last night，but it ______ in my pocket this morning.How strange!

How does your grandpa ________ healthy–He eats well and exercises every day．

Not only the students but also the teachers took part _______ the school sports meeting last week.