1．The Day of the Dead, an ancient Mexican festival, is not a sad day, but time to celebrate cycle of life.
A．a, the B．不填, the C．不填,a D. the, a
2．—Let’s throw a surprise party for mom’s 50th birthday.
—That’s a good idea. We several of her friends.
A．invite B．had invited C．are inviting D．will invite
3． life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
