What really worries us is ______ the explorers can accurately locate themselves with the device in case of bad weather.
You have to pass a driving test_____ you can get a licenseA before B until C when D since
What impresses me most is ______ he appears in front of others, he wears a sincere and charming smile.A.which B.that C.where D that whenever
____ difficulties we meet, we can work them out.
The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.
She found her calculator ________ she lost it.