According to a new study by a British’s university, learning ________ second language can lead to ________ increase in your brain power.
A．a; the B．不填; the C．a; an D．the; an
She spent four weeks which she could afford _______ around the country, promoting her new album.
A．to tour B．toured C．touring D．having toured
It is said that people are________ likely to tell lies over the phone as they are in emails.
A．as twice B．twice as C．twice more D．twice than
His suggestion made me angry, but _______.
A．making others happy B．to make others happy
C．others happy D．with others happy
Generally speaking, my grandmother is nice and kind, but she _______ be very
stubborn at times.
A. should B. shall C. must D. can
Most animals have little connection with animals of a different kind, _______ they hunt them for food.
A．if B．while C．unless D．as
