We give dogs time, space and love we can spare, and ____________, dogs give us their all.
A．in chargeB．in factC．in caseD．in return
D

試題分析：A．in charge負責(zé)，B．in fact事實上，C．in case以防，萬一，D．in return回報，句意：我們可以給狗能騰出的時間，空間和愛，并且做為回報狗給我們他們所有。所以選D。
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