What is Tom up to? He’s seldom turned in his assignments these days, ________?[ ]

Beijing has ________ many buses that there is often a traffic jam in rush hours,

Travelling, talking with friends and relatives, and other forms of relaxation are very likely to _______ the well-being of metal health.

The weather here is different from ________ in Beijing, but the people here are as friendly as _________ in Beijing.

The woman does some cleaning every day, because she wants to keep the house_____________.