a.increase
b.spread
c.collect
d.grow
* 13.Our pan is to allocate one member of staff to handle appointments.
a.assign
b.persuade
c.ask
d.order
* 14.Her behavior is extremely childish.
a.simple
b.immature
c.beautiful
d.foolish
* 15.We also want to use the water to irrigate barren desert land.
a.hairless
b.bare
c.empty
d.bald