How many years does it take for a student to do a Bachelor degree in the U.K.？A.4B.2C.

Once environmental damage, it takes many years for the system to recover.A．had doneB．is do

How long does it take for some industries acquiring commercial potential？A．From five to te

How many years does it usually take for a student to do a Master degree in the U.S.？A.

How long does it take to cover the workbook material？A．For more than a term.B．For less tha

How long does it take for the runners to cross the starting line in recent Marathon races？

Once damage______, it takes many years for the natural environment to recover.A．has doneB．