翻译：WewishtocallyourattentiontothevalidityoftheL/C,sincethereisnopossibilityofL/Cextension.

Generallywecoverinsuranee__definite(明确的)instructionsfromourclients.()

Thetwinsisterswereidentical________appearanceandcharacter.

In our department, every student _________ after-school activities.

The theory of language underlying the Grammar-Translation Method was derived from _____ Linguistics.