Her voice ________a more serious tone.
A.took away B.took out C.took on D.took off
The growth of GDP in China will be largely slowed down in the next few years ________it mainly relies on the exploration of the resources available.
A.because of B.due to C.thanks to D.now that
So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
A.mustn’t be B.may not be C.can’t be D.won’t be
I drink a cup of coffee________；but usually I take tea.
A.frequently B.often C.constantly D.occasionally
At first sight，Tom ________in love with Mary. Two months later，he ________her.
A.was；married B.fell；married
C.was；was married to D.fell；married with
As is well known，Edison was one of the greatest scientists________.
A.all the time B.all time C.of all time D.of all the time
