--- Hello! Is that Tom over there? Long time no see. Let’s say hello to him.---Please _____ in the library.
Scientists think that there _____ life on Earth for millions of years.
Some scientists have sent a spacecraft to Mars. It ____ several months to get there.
Do you know thegirl ?
--- Where’s Mary? --- She _____ to Harbin.
They arrived _____Shanghaia cold morning .