—Where have you been recently? —I ________ in Hangzhou on business for a week last month.
In that school, English is compulsory for all students, but French and Russian are _______.
You’ll find taxis waiting at the bus station ______ you can hire to reach your host family.
The police officers in our city work hard ______ the rest of us can live a safe life.
There is clear evidence ______ the most difficult feeling of all to interpret is bodily pain.
The rare fish, ______ from the cooking pot, has been returned to the sea.