I wonder why Jenny to us recently. We should have heard from her by now.[ ]

The fact has worried many scientists ________the earth is becoming warmer and warmer these years

Joan, what _______ in your hand ? —Look! It’s a birthday gift for my grandma

Liu Ping can’t play basketball. I can’t play basketball, ______.

ll the books he was interested in _______, heleft the library and went back to his dorm