Polar explorers have to be extremely ______ to endure the abominable climate and other har

3.We have explored or sent robot spaceships to the

【C17】A．to payB．payingC．to be paidD．to have paid

You have to be patient if you want to sustain

You have to be patient if you want to sustain

You have to be patient if you want to sustain

Polar explorers can stay alive without heaters an