John said he’d been working in the office for an hour, ____ was true.
| A．he | B．this | C．which | D．who |
Li Na officially announced his retirement on September 18, 2014, ________ tennis for 26 years.
| A．having played | B．had played |
| C．played | D．having been played |
You should avoid _______ for your class.
| A．to be late | B．late |
| C．being late | D．to have been late |
There ______the school bus. Hurry up!
| A．is coming | B．comes | C．has come | D．will come |
Nowadays, how we can take good care of _______old is becoming _______hot and serious topic.
| A．the; a | B．a; the |
| C．a; a | D．the; the |
Don’t worry about the baby not wanting to leave you----it’s a stage _______they all go through.
| A．where | B．that | C．when | D．what |