Ihavebeenstudyinghereforfouryears,bynextsummerI________.
A、shallgraduateI know it isn ’t important but I can ’t help ________ about it.
Tosucceedinascientificresearchproject________.
Ifound________toanswerallthequestionswithinthetimegiven.
How long ________ they ________ (dig) the ditch?
________(catch)intherain,hewaswettotheskin.
