Which sentence contains an adverb clause?
AOnly 1,600 covered bridges exist in the world.
BIf you visit Pennsylvania, take the self-guided, covered-bridge tour.
CCovered bridges remind us of days gone by.
DThe Lehigh Valley, in eastern Pennsylvania, has seven covered bridges.
AOnly 1,600 covered bridges exist in the world.
BIf you visit Pennsylvania, take the self-guided, covered-bridge tour.
CCovered bridges remind us of days gone by.
DThe Lehigh Valley, in eastern Pennsylvania, has seven covered bridges.